Method of forming terminal rivets



June 6,' 1933.; c. cs. OLSON 1,912,553

I METHOD OF. FORMING TERMINAL RIVETS Filed March 21. 1930 w I n- I I I20 M E a I I will? Patented June- 6, 1933 UNITED A srras CARL G. OLSON,OF CHICAGO, ILLINOIS, 'ASSIGINOR TO SHAKEIPROOF LOOK WASHER COMPANY, OFCHICAGO, ILLINOIS,

A CORPORATION OF -DELAWABE METHOD OF FORMING TERMINAL RIVETS Applicationfiled March 21,

w an insulating panel by means of a separate rivet which is insertedthrough the aperture of the terminal. Terminal members of the abovementioned type are disclosed in a number of my co-pending applications,for example, my application, Serial No. 413,707, filed December 13,1929. I

It is one of the primary objects of my present invention to eliminatethe necessity of employing separate terminal and rivet elements, and tothis end I propose to provide a device of a unitary or integralconstruction, in which one section thereof presents an extension orterminal portion, and another section thereof forms an integral rivet.

My invention contemplates the provision of a new and improved method ofmaking such devices from a single piece of stock.

A still further and more specific object is to provide 'a method,wherebya terminal, rivet may be. formed from a single piece of roundstock. or wire by bending and upsetting said round stock in such amanner as to present a complete terminal rivethaving a section thereoffor receiving a conductor and another rivet section thereof for securingthe device in position.

These and numerous other objects and advantages will be more apparentfrom the following detailed description when considered in connectionwith the accompanying drawing, wherein:

Figure 1 is an elevational view of apiece of round stock or wire, fromwhich a unitary terminal rivet maybe formed by practicing the methodwhich is contemplated by my present invention; v Figure 2 discloses thestep of stock of Figure 1;

Fi ure 3 discloses the next step, which consists 1n shaping the bentstock of Figure 2 into bending the shown in the other figures.

1930. Serial No. 437,795.

a fiat type terminal section and a rivet section extending laterallythereof;

Figure 4 is an enlarged view similar to Figure 3 disclosing the nextstep in the formation of the article, which consists in providing aconductor receiving aperture at one extremity 'of the terminal sectionand a recess within the rivet section;

Figure 5 is a View of the underside of the device shown in Figure 4;

Figure 6 discloses the device of Figures 4; and 5 with a plurality ofwork engaging, locking teeth formed onthe flange portion, whichispositioned at one extremity of the rivet section;

Figure 7 is a view of the underside of Fig- Figure 8 is a sectional viewtaken centrally and longitudinally of the terminal rivet, said devicebeing shown in operative association with a sheet of insulatingmaterial, with the teeth thereof imbedded within 'said material;

Figure 9 is a terminal rivet of a modified form, the terminal sectionthereof extending longitudinally instead of laterally of the rivetsection; and i Figure 10 is still another modification, wherein a pairof terminal sections are employed instead of a single terminal sectionas Referring now to the drawing more in detail wherein like numeralshave been em ployed to designate, similar parts throughout the variousfigures, it will be observed that my invention contemplates theprovisionof a new and improved method for making terminal rivets of theunitary type,-and this method consists in selecting or severing from astrip a section such as a length of round stock or wire which I havedesignated generally by the numeral 12 in Figuresl and 2. This sectionor length of round stock is first bent to present the structure shown inFigure 2, and this bent structure is subjected to a forming operation,such as by means of a suitable die (not shown), to present the structureshown in Figure 3'. The structure of Figure 3, as well as the structureof Figure 4, includes an elongated flat terminal 100 section 14,one'extremity of said section being formed with an annular or flangesection 16. Extending laterally and centrally of said flange section isa cylindrical section 18 which might be termed a rivet section.

' The outer extremity of the terminal section H isformed with anaperture 20 such as by punching or drawing, which is designed to receiveaconductor 22, as clearly shown in Figure 8. The rivet section 18 isprovided with a central elongated aperture 24 to facilitate theupsetting of the rivet section after the same has been associated with apiece of sheet materiahsuch as the insulating material 26 shown inFigure 8. A

' plurality of teeth '28 are swedged or formed along one face of theflange section 16 as by means of a suitable swedging die, and theseteeth are adapted to imbed themselves within the sheet ofmsulatingmaterial 26 to-secure the terminal and rivet sections against rotativemovement.

In use, the rivet section 18is inserted with in an aperture 30 providedin the sheet 26,

and the portion of the rivet section extending beyond the sheet andsurrounding the re-' cess 24 may be upset or peened over to present anannular flange. 32 as shown in Figure 8, which may be brought to bearagainst the surface of the sheet26, and thereby cause the teeth 28 tobecome imbedded within the op-' posite surface of the sheet. Ifdesirable, a conductor 34 may be simultaneously secured in positionagainst the inner surface of the annular flange 32. Thus it willbeapparent that my invention not onl contemplates the a sheet ofinsulating material by emplloying .a separate or independent rivet, whicis inserted through an aperture provided in the connector. My improveddevice, asaresult of its integral or unitary construction, eliminatesthe necessity of handling two elements, and the structure of my deviceis much" more simple in construction than the combined independentelements which have -been pre-I viously employed. v

.My'invention is in no sense to a connector or terminal device having ater-' mifisl section of any specific design, and thisis evidenced by the.modified structures shown in Figures 9 andl'O. In Figure'9 I have showna device which is-similar to the terminal devices just describedin thatsaid figure discloses the rivet section 18 extending Having thusdescribed m y in vention, what provision ofa simple an economicalmethvery deslm outwardly from the flange 16, which is provided with aplurality of work engaging teeth 28. However, the structure in Figure 9differs from the other devices in that a terminal section 1411 formedintegral with the flange section 16 extends outwardly from the igure 10I have shown a plurality of.

Thus it will be apparent that my invention contemplates the provision ofunitary or integral terminal devices of varying sizes and shapes.

From the foregoing it will be understood that the steps of my simplemethod for manufacturing terminal devices may be practiced by employingconventional types of shop machinery, and therefore said-method may bepracticed ina very expeditious manner. The device which is produced as aresult of the practice of my improved method, has many practicalapplications, such for example, as in the radio industry wherein aplurality of terminals or connectors are frequently employed inconnection with the panels of receiving units and the like. Terminaldevices for such purposes are used in very large quantities, and,therefore it is 1e to reduce to a minimum the cost for manufacturingsuchdevices, and also to reduce as far-as possible the amount of laborin mounting such devices upon insulating panels and the like. Myinvention meets these requirements by roviding a simple and economicalmethod 0 manufacture, as well as a device, which, by reason of itssimple unitary construction, may be mounted upon a panel with a minimumamount of effort and skill. By providing the teeth along one face of theterminal flange, I- am able to positivelysecure the device againstdisplacement.

In the drawing I have shown the terminal device as being formed from alength of round stock, but 0 viously, lengths of stock having othercross-sectional shapes may be emplcyed without departing from the spiritan scope of my invention.

' In fact, my inventioncontemplates the manufacture of integral terminalrivets from any form of stock which may be convenient ly subjected toforming or stamping 0 erations. Oneof the importantfeatures o theinvention resides in t e fact that it enables theproduction of terminalrivets of unitary or in l'form from lengths or sections of vario shapedstock.

I claim as new and desire to secure by Letters Patent is:

1. The method of forming electrical terminal devices whichconsistsin.bending a length of elongated conductive material, flatteninga portion of said bent length to present a terminal section and forgingthe other portion to present a rivet section, and

then providing a recess in said rivet section,

whereby said rivet section may be upset when applied to a panel. I

2. The method of forming electrical terminal devices which consists inbending a length of elongated conductive material,

flattening one of the resulting sections into anelongated terminalsection, and upsetting the other section to present a rivet sectionextending laterallyvof said flattened terminal section.

3. The method of forming electrical terminal devices which consists inbending a length of elon ated conductive material,

flattening one o the resulting sections into an elongated terminalsection, and upsetting the other section to present a rivetsectionextendinglaterall of said terminal section and to present a ange havingwork engaging teeth surrounding said rivet section.

4. The method of forming electrical ter minal deviceswhich consists inbending a length of elongated conductive material, forming one of theresulting sections into an elongated terminal section, upsetting theother section to present a rivet section extending laterally of saidterminal section" and to present a flange having work engaging teethsurrounding said rivet section and providing a recess in the rivetsection, w ereby said section may be upset for securing the device inposition upon a work piece.

In witness whereof, I have hereunto subscribed my name.

CARL G. OLSON.

